Particle System Start and Stop GetKeyDown/Up Not Working

Questions & Answers
1

I wrote a script that is supposed to start the particle system when you push the w key down and to stop it when you pull it up. I keep getting these errors:
Assets/Splash.js(6,32): BCE0020: An instance of type ‘UnityEngine.ParticleSystem’ is required to access non static member ‘Play’.

Assets/Splash.js(12,32): BCE0020: An instance of type ‘UnityEngine.ParticleSystem’ is required to access non static member ‘Stop’.

Here is the script:

function Update ()

{

if (Input.GetKeyDown ("w"))   

{  

	ParticleSystem.Play;  

}  

{  

if (Input.GetKeyUp ("w"))  

{  

	yield WaitForSeconds (1);  

	ParticleSystem.Stop;  

}  

}

}

2

You want the instance of the particle system attached to this game object, not the ParticleSystem class. So use a small ‘p’. And Play and Stop are functions, so you need the ‘()’ after the function name:

particleSystem.Play();

Note this is a shortcut for:

gameObject.GetComponent(ParticleSystem).Play();

See the reference entry for GameObject for the things that have shortcuts.